Machine for molding artificial stone.



PATENTED APR; 7, 1903..

NpF. PALMER. MACHINHI'OR MOLDING ARTIFICIAL STONE.

'AIPLIOATION FILED JAN. 15, 1903.

2 SHEETS-SHEET '1,

N0 MODEL.

UNITED STATES PATEN'r OFFICE.

NOYES F. PALMER, OF BROOKLYN, NEW YORK.

MACHINE FOR MOLDING ARTIFICIAL STONE.

SPECIFICATION forming part of Letters PatentrNo. 724,608, dated April 7,1903.

Application filed January 15, 1905. Serial No. 139.169. mamas.)

To all whom it may concern:

Be it known that I, NOYES F. PALMER, a citizen of the United States, anda resident of Brooklyn, county of Kings, and State of New York, haveinvented certain new and useful Improvements in Machines for MoldingArtificial Stone, of which the following isaspecification.

This invention relates to an improved machine for molding artificialstone, which is so constructed that the means for lowering the cores orpartitions are independent of the means for raising the block out of themold.

The machine is particularly designed for molding simultaneously a largenumber of narrow blocks or slabs in which an increased amount offriction is to be overcome'and nicety in manipulation is necessary toavoid line 5 5, Fig. 4; Fig. 5% a section on line 595 Fig. 5; Fig. 5 adetail of the false bottom, partly broken away; and Fig. 6, a detail ofthe tamper.

The letter a representsthe frame of the machine, and b is the base-plateof the mold, which has the slidable sides 0. These sides may be operatedin suitable manner, the drawings showing them provided with racks c,engaged bylpinions (1, fast on shafts d, which are intergeared bybevel-wheels (1 so as to be-simultaneonsly rotated by a handle d Belowthe base I) of the mold there is arranged a vertically-movable platen orplunger 6, from the upperside of which project a series of parallelpartitionsor cores 6. These partitions pass through correspondingslotsb' of base b, and thus subdivide theinterior of the mold into anumber of compartments b each of which is'adapted for the formation of asingle block.

In order to lift the blocks out of the mold, I mount upon the base I) afalse bottom f, slotted, as at f, for the passage of partitions looselymounted upon shaft h.

depending from platen e.

. binding of the material is to be avoided.

The means for independently operating the platen e and the false bottomfare as follows: Within the bearings g h of frame a are mounted twoparallel longitudinal shafts g and h. The shaft g maybe rotated by acrankhandle t' through gearing t" 2' i 9 Fig. 2. The shaft 72. mayberotated independently of shaft g by crank-handle j through gearing j j jk Fig. l. Upon the shaft 9 are keyed two pinions g 9 meshing intopinions h 71 In this way the rotation of shaft g will rotate pinions kwithout, however, rotating shaft h. The pinions 9 h engage racks orlifters 70, that pass through the platen e and base I) to bear againstthe lower side of false bottom f. Thus the rotation of shaft g willcause the racks k, and consequently the false bottom, to be raised orlowered- To the shaft h are keyed a pair of pinions h, that mesh intoracks e Thus when the shaft 71 is rotated it will raise or lower thepartitions e, without, however, rotating shaft g.

In use the concrete is filled into the mold, and tamped by means of atamper l, which is preferably of the construction shown in Fig. 6. Thistamper is provided with a series of arms Z, adapted to straddle thepartitions e and each terminating in a foot 1*, so that the material ina number of compartments may be simultaneously compressed. After thematerial has been tamped and struck off the partitions e are withdrawnby turning handle j, the mold is opened by turning handle (1 and finallythe blocks are raised to clear the mold by turning handle a, when theoperation is completed.

It will be seen that by my machine a large number of blocks or slabs maybe simultaneously molded Without the use of excessive power and withoutliability of injuring the blocks due to packing or binding or to anuneven action of the machine.

What I claim is 1. In a machine for molding artificial stone, thecombination of a mold with a false bottom, a partition-carrying plunger,and independent means for operating said false bottom and plunger,substantially as specified.

2. In a machine for molding artificial stone, the combination of a moldwith a pair of parallel, independently-rotatable shafts, gearwheels faston one shaft, intermeshing gearwheels loose on the second shaft, racksengaged by the gear-wheels, a false bottom engaged by the racks, a pairof gear-wheels fast on the second shaft, and a plunger having racksengaged by said gear-wheels, substantially as specified.

3. In a machine for molding artificial stone, the combination of aslotted mold with a plunger having a series of parallel partitions, aslotted false bottom, and independent means for operating said falsebottom and plunger, substantially as specified.

4. In a machine for molding artificial stone, the combination ofaslotted mold with a pair of parallel, independently-rotatable shafts,gear-wheels fast on one shaft, intermeshing gear-wheels loose on thesecond shaft, racks engaged by the gear-wheels, a slotted false bottomengaged by the racks, a pair of gearwheels fast on the second shaft, aplunger having a series of parallel partitions, and racks thatoperatively connect said gear-wheels with said plunger, substantially asspecified.

Signed by me at New York city, New York, this 14th day of January, 1903.

NOYES F. PALMER.

Witnesses:

F. v. BRIEsEN, EDWARD RAY.

